School districts and non-profits across the country may apply for $150 million worth of Investing in Innovation, or i3, grants. Offered by the U.S. Department of Education, the grants support innovative approaches that significantly improve teacher effectiveness and student achievement, engagement and attainment.

Three types of grants are available under the i3 program: Scale-up grants, Validation grants and Development grants. Funding levels range from $3 million to $25 million.

Applications are due Aug. 2, and awards will be made no later than Dec. 31.